Abstract

Molecular beam epitaxial growth and the optical properties of lattice-matched alloys on InP were investigated. Two-dimensional growth and high crystalline quality were achieved by forming an InP buffer layer and a buffer layer before the layer growth. The band-gapenergy of the films, measured by optical-reflection measurements, increased with the Mg content and is expressed by the quadratic equation We found that the Stokes shifts of quaternary alloys, which seemed to originate from deep trap levels related to Te clusters, were larger than those of ZnSeTe ternary alloys. The refractive index of at a wavelength of 600 nm decreased as the Mg content rose, as expressed by the linear equation